This bit of code checks to see if the current year is a leap year. If it is, it sets $leapyear to 1, If it's not, $leapyear is set to 0.
@time = localtime;
$leapyear = 1;
$leapyear = 0 if (($time[5]+1900) % 4);

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In reply to Checking for leap year by joshua

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